Index: src/ia32/macro-assembler-ia32.cc |
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc |
index d5eda7a0d7640be2bc25d2f5375316c91acdd006..5c5d15567064a1c423194696574d500d4ce86f25 100644 |
--- a/src/ia32/macro-assembler-ia32.cc |
+++ b/src/ia32/macro-assembler-ia32.cc |
@@ -77,6 +77,46 @@ void MacroAssembler::RecordWriteHelper(Register object, |
} |
+void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg, |
+ XMMRegister scratch_reg, |
+ Register result_reg) { |
+ Label above_zero; |
+ Label done; |
+ Label in_bounds; |
+ ExternalReference zero = ExternalReference::address_of_zero(); |
+ movdbl(scratch_reg, Operand::StaticVariable(zero)); |
+ ucomisd(input_reg, scratch_reg); |
+ j(above, &above_zero, Label::kNear); |
+ Set(result_reg, Immediate(0)); |
+ jmp(&done, Label::kNear); |
+ bind(&above_zero); |
+ ExternalReference uint8_max_value = |
+ ExternalReference::address_of_uint8_max_value(); |
+ movdbl(scratch_reg, Operand::StaticVariable(uint8_max_value)); |
+ ucomisd(input_reg, scratch_reg); |
+ j(below_equal, &in_bounds, Label::kNear); |
+ Set(result_reg, Immediate(255)); |
+ jmp(&done, Label::kNear); |
+ bind(&in_bounds); |
+ ExternalReference one_half = |
+ ExternalReference::address_of_one_half(); |
+ movdbl(scratch_reg, Operand::StaticVariable(one_half)); |
+ addsd(scratch_reg, input_reg); |
+ cvttsd2si(result_reg, Operand(scratch_reg)); |
+ bind(&done); |
+} |
+ |
+ |
+void MacroAssembler::ClampUint8(Register reg) { |
+ Label done; |
+ test(reg, Immediate(0xFFFFFF00)); |
+ j(zero, &done, Label::kNear); |
+ setcc(negative, reg); // 1 if negative, 0 if positive. |
+ dec_b(reg); // 0 if negative, 255 if positive. |
+ bind(&done); |
+} |
+ |
+ |
void MacroAssembler::InNewSpace(Register object, |
Register scratch, |
Condition cc, |